13650381 has 6 divisors (see below), whose sum is σ = 19717230. Its totient is φ = 9100248.

The previous prime is 13650359. The next prime is 13650391. The reversal of 13650381 is 18305631.

13650381 is a `hidden beast` number, since 1 + 3 + 650 + 3 + 8 + 1 = 666.

13650381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11594025 + 2056356 = 3405^2 + 1434^2 .

It is not a de Polignac number, because 13650381 - 2⁵ = 13650349 is a prime.

It is a super-2 number, since 2×13650381² = 372665802890322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13650391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 758346 + ... + 758363.

It is an arithmetic number, because the mean of its divisors is an integer number (3286205).

Almost surely, 2^13650381 is an apocalyptic number.

It is an amenable number.

13650381 is a deficient number, since it is larger than the sum of its proper divisors (6066849).

13650381 is a wasteful number, since it uses less digits than its factorization.

13650381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516715 (or 1516712 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 13650381 is about 3694.6422018918. The cubic root of 13650381 is about 238.9910245633.

The spelling of 13650381 in words is "thirteen million, six hundred fifty thousand, three hundred eighty-one".